Mahabharata 1.43.4

तत्र मन्त्रविदां श्रेष्ठस्तपोवृद्धो महाव्रतःजग्राह पाणिं धर्मात्मा विधिमन्त्रपुरस्कृतम्

tatra mantravidāṃ śreṣṭhastapovṛddho mahāvrataḥjagrāha pāṇiṃ dharmātmā vidhimantrapuraskṛtam

Our plain-language meaning of this verse is waiting for scholar review.